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Single-tracer Multiparametric PET Imaging

Award Number: R01EB033435
ORGANIZATION: NATIONAL INSTITUTE Of BIOMEDICAL IMAGING & BIOENGINEERING
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 09/19/2022
PERIOD OF PERFORMANCE END DATE: 06/30/2026

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Single-tracer Multiparametric PET Imaging - PROJECT SUMMARY Blood flow and cellular metabolism are two basic but vital physiological processes that are often dysregulated in major diseases. Imaging of flow-metabolism mismatch or coupling is of broad clinical and research significance in many diseases, for instance, in ischemic cardiomyopathy for assessing myocardial viability, in cancer for grading tumor aggressiveness, and in neurodegenerative diseases for studying brain function. A major challenge in PET imaging of flow-metabolism is that scanning for these two processes requires two different radiotracers–18F-fluorodeoxyglucose (FDG) for metabolism and a second flow radiotracer for perfusion imaging. While FDG is widely available in the clinic for metabolic imaging, perfusion imaging by PET is clinically limited, resulting in underutilization of flow-metabolism imaging in both research and clinics. The goal of this project is to develop a single-tracer multiparametric PET imaging solution for simultaneous flow- metabolism imaging using only 18F-FDG without the need for a second flow-specific radiotracer. Early attempts from others and our group have used FDG blood-to-tissue delivery rate (K1) as a proxy of blood flow. However, the accuracy of FDG K1 approximating blood flow largely depends on the FDG extraction fraction in tissues and is also compromised by the correlation between FDG K1 and blood glucose levels. Our preliminary work has tackled these problems specifically in the myocardium and demonstrated the feasibility of using FDG for measuring myocardial blood flow. The focus of this proposal is to extend the effort to a large study and to the whole body, and further develop the enabling techniques to improve FDG blood flow quantification. We will (1) develop glucose-normalized extraction fraction correction for FDG blood flow quantification in various organs using total-body dynamic PET; (2) develop high-temporal resolution kinetic modeling for improved FDG blood flow quantification; (3) improve FDG blood flow imaging on short PET scanners using advanced image reconstruction. Successful completion of this project will develop a new technical capability of 18F-FDG for simultaneous multiparametric imaging of blood flow and glucose metabolism with reduced radiation dose, imaging time and cost. This would also open up many new opportunities for clinical applications that require multiparametric imaging biomarkers but have been historically restricted by the accessibility of perfusion imaging, thus making a broad impact in multiple PET applications for patient clinical care and research.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2025 ( Subtotal = $609,419 )
2025	2025	UNIVERSITY OF CALIFORNIA, DAVIS	1850 RESEARCH PARK DR STE 300	DAVIS	CA	95618	YOLO	USA	Discovery and Applied Research for Technological Innovations to Improve Human Health	000	4	6/13/2025	NON-COMPETING CONTINUATION	$609,419
														Subtotal = $609,419

Issue Date FY: 2024 ( Subtotal = $597,231 )
2024	2024	UNIVERSITY OF CALIFORNIA, DAVIS	1850 RESEARCH PARK DR STE 300	DAVIS	CA	95618	YOLO	USA	Discovery and Applied Research for Technological Innovations to Improve Human Health	000	3	8/16/2024	NON-COMPETING CONTINUATION	$597,231
														Subtotal = $597,231

Issue Date FY: 2023 ( Subtotal = $620,254 )
2023	2023	UNIVERSITY OF CALIFORNIA, DAVIS	1850 RESEARCH PARK DR, STE 300	DAVIS	CA	95618	YOLO	USA	Discovery and Applied Research for Technological Innovations to Improve Human Health	001	2	7/1/2023	NON-COMPETING CONTINUATION	$620,254
2023	2022	UNIVERSITY OF CALIFORNIA, DAVIS	1850 RESEARCH PARK DR, STE 300	DAVIS	CA	95618	YOLO	USA	Discovery and Applied Research for Technological Innovations to Improve Human Health	000	1	6/29/2023	NEW	$0
														Subtotal = $620,254

Issue Date FY: 2022 ( Subtotal = $618,342 )
2022	2022	UNIVERSITY OF CALIFORNIA, DAVIS	1850 RESEARCH PARK DR, STE 300	DAVIS	CA	95618	YOLO	USA	Discovery and Applied Research for Technological Innovations to Improve Human Health	000	1	9/19/2022	NEW	$618,342
														Subtotal = $618,342

Grand Total All Awards = $2,445,246

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Single-tracer Multiparametric PET Imaging

Award Number: R01EB033435

ORGANIZATION: NATIONAL INSTITUTE Of BIOMEDICAL IMAGING & BIOENGINEERING

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 09/19/2022

PERIOD OF PERFORMANCE END DATE: 06/30/2026

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